IgorT
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Re: 12x Murder Fund! (Complete!)
It's just a photo-diode that detects IF there is light above a certain minimum cut-off level. The replottings are meant to test what happens in between.
Problem is, i made an assumption that if a diode will die, it will die PROPERLY, as in LED, or at worst like a "BDR-S03", which still lases a few mW (which would get ignored by the sensor).
As for the circuits, unless you also have time to MAKE them, don't bother, cos i don't have the time.
As i said, the replottings were supposed to do these checkups, but the >150h the first 8x survived lulled us all into a false sense of safety, causing me not to check every single hour.
P.S. Checking degradation on the fly would also require a constant temperature setup for each diode... They warm up quite a bit during cycling.. Not enough to call them hot, but enough to reduce the power a little, altho a simple instrument might not even notice this..
@ IgorT:
The sensor that you have used, is just a photodiode or phototransistor that you have used as switch for the counter, or is a photodiode that can be used as level output measurer ? ..... or, in alternative, can you place a simple piece of glass in the beam at 45 degrees, for take out a fraction of the beam ?
Just an idea ..... if you need, i can draw a circuit, for that, and if for any luck you have a photocell, instead a photodiode (or a piece of cell like the ones in solar panels and solar powered calculators), is also better , cause it's a photo-battery, so it need also less or almost no circuitry
It's just a photo-diode that detects IF there is light above a certain minimum cut-off level. The replottings are meant to test what happens in between.
Problem is, i made an assumption that if a diode will die, it will die PROPERLY, as in LED, or at worst like a "BDR-S03", which still lases a few mW (which would get ignored by the sensor).
As for the circuits, unless you also have time to MAKE them, don't bother, cos i don't have the time.
As i said, the replottings were supposed to do these checkups, but the >150h the first 8x survived lulled us all into a false sense of safety, causing me not to check every single hour.
P.S. Checking degradation on the fly would also require a constant temperature setup for each diode... They warm up quite a bit during cycling.. Not enough to call them hot, but enough to reduce the power a little, altho a simple instrument might not even notice this..
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